Watch List notes:

Mexico City, Mexico, cob 4 reales, 1620/19(D), rare. S-M18; KM-unl. 12.48 grams. Very bold 20 of date with clear 9 under the 0, good cross and upper half of shield but otherwise flat (as struck), no corrosion, nicely toned. Pedigreed to the Sao Jose research collection, with certificate, booklet, DVD and NGC tag #1974063048. Recovered from: Sao Jose, sunk in 1622 off Mozambique, east of Africa

Estimate: $350 - 500